net.Socket(fd) should start readable and writable

lib/net_uv.js

@@ -89,6 +89,7 @@ function Socket(options) {
     //   console.trace();
     this._handle = createPipe();
     this._handle.open(fd);
+    this.readable = this.writable = true;
     initSocketHandle(this);
   } else {
     // private

test/simple/test-console.js

@@ -25,6 +25,10 @@
 var common = require('../common');
 var assert = require('assert');
 
+assert.ok(process.stdout.writable);
+assert.ok(process.stderr.writable);
+
+
 var stdout_write = global.process.stdout.write;
 var strings = [];
 global.process.stdout.write = function(string) {